Subspecies, varieties, forms and cultivars of plants belonging to the Arrojadoa rhodantha group

Arrojadoa rhodanthaBritton & Rose: has cylindrical stems over one metre long. Spines mostly brown. The tubular violet-red flowers are produced in clusters from a cephalium at the top of the joints. Distribution: Brazil, (Bahia, Piauí, Pernambuco, Minas Gerais and Goias).